Auxiliary safe and vault lock



April 7, 1925. 1,532,435

- w. E. MURRAY AUXILIARY SAFE AND VAULT LOCK Filed June 8, 1921 2 Sheets-Sheet 1 I I /zo 3 2 MLTER EMURRAY.

April 7, 1925. 1,532,435

W'. E. 'MURRAY AUXILIARY SAFE AND VAULT LOCK Filed June a, 1921 2 Sheets-Sheet 2 awe/whoa Tag. 4-.

WWW:

abutting the flange 8 and fixedly Patented Apr. 7, 1925.

vv'anrnn nun-nae, onncnr nensn, town, ANY, oenrozsn'rron nanora.

"0 PEOPLES; INVESTl /IE'N'E GO'IYCH aU rLrenY sa;

Application filed June 8 To all whom it may concern:

Be it known that I, WALTE E. lolunner, a citizen of the United States, and a resident of Fort Dodge, in the county, of

5 ry b t dJState oflowa, have inve e ccrtrin new and useful Improvements in Auxiliary. Safe and Vault Locks, of which the following is aspeciiication. 7

My invention relates to aunlliary safe and vault locking nechamsm, for use 111 reventing unauthorized opening of safes and vaults hydjcstruc'tlon o1"; theusual coinhinstion-controlled locking means. It is the object of my invention to provide a simple and inexpensive auxiliary lo'c ki ng means, which niay be readily applied to the locking niechanisln of sates and vaults, and which is automatically operable to prevent of a vault door equippedwith the auxiliary lock, and I) is a'detail showing the con nection oi the latch-holdingmeans with the coinbination-lock-casing. I

The illustrated embodiment of my invention is particularly adapted'ior use upon a vault door of the, type shown in Fig. Al, wherein the door-plate? has near the edges thereot inwardly extending flanges 8 through which the bolts 9 pass slidaoly, the horizontal bolts being connected With each other by a vertical bar 10 having the usual connection with a handle by which the bolts are moved tolocked andwunlocked positions, and there being'the usual combination-lol: arranged in a casing 11 and operable to prevent movement of the bolts when locked.

My auxiliary lock comprises a bar or frame-piece 12 which is disposed in a hori zontal position adjoining the inner side of the door-plate '7, with one end of the bar secured thereto by a single cap-screw 13. At the opposite or inner end of the frame-piece finger 17, constantly tends turnhler-hloclr to the 'l'iorizontal position.

near the end-plate 1 1- thereon. casing 2G encloses the upper portion of the Serial or bar thee is secured a vertically 6X- tending plate A, and to the upper end of ,said plate is secured the end of a tuhul r spring-casing 15. The latter fi1St'Z-;ii1LlS troi'n the plate ll horizontally above the I EDS-PIGCQ 12, and thencurves downwardly to the upper side thereof, entering an opening therein 'heing secured by a transverse screw 18. The lower side of the d portion of the-tuhe,-and o f theifiadt end of the horizontal portion thereof,-are otted to receive a ni'vableli-nger 17 n V k5; "min-g the terminal portion of a plate 18 which secured to the tunihler hloc'lt 19 by lneans ofscrews 20. A; Sillfall plunger 21 ht 's'hdahly wrthln the tu"-e 1:5 is pressed a -"ist the linger 17 by means of spnng The tuinhler-hloclz 19. is pivoted upon a screw '23'at the side of the frame- "nipoe 1 p N .LLI,

'lhe plate 18 has an onset portion extending in over theupper side of the frame-piecelfi, and r in the last-n" led position ol": the turn'hlerblocksaid portion-ozt-the plate rests upon the upperside ot' the frame-piece, forming a stop to prevent movement of the tumbler-block heyond the horizontal position. Thepressu-re of'the spring 22 against the plunger :21, and of the latter upen thc to move For re a ing the tumbler-block in the vertical position there is provided upon 'the plate 18 a loop 2e which isadapted to he engaged by the latch-hook 25. The shanl-z elf-the latch-hook extends slidably through ayertical open ng in the frail e-piece 12 A tubular 9 tlLLOlQf-lJlGCli is in its vertical pothe i and is movable about said pivotscrew from the vertical position shown in -F 1 too horizontal position indicated by dotted linesiin the same ii 'ure.

the

a masses sition it will not interfere with the usual movements of the bolts and bar 10.

Normally the tumbler-block is retained in the raised or inactive position by engaging the latch-hook with the loop 24, and holding the latch-hook in said engaged position by means of a tension-member 29 whlch is connected therewith at its end and extends to a hook 30 arranged on the lock-casing 11, as shown in Figs. 4 and 5. A. portion of the tension-member is formed by one or more fusible links 31, comprising parts which are normally united by a material fusible at a relatively low temperature, whereby the application of any excessive or abnormal heat will melt said connecting material and permit the separation of the linkparts.

It grill be readily seen that by the arrangement of the auxiliary lock in the manner shown and described, it will not normally interfere with the usual operation of the regular locking mechanism for the door. Should any attempt be made, however, to open the door by destruction or dislocation of the combination-lock, the. displacement of the casing 11 will result in freeing the tension-member from the hook 30, .and thus release the latch-hook to permit movement of the tumbler-block to its operative, horizontal or looking position. Similarly, an attempt to cut through the door by means of an electric arc, or by an oily-acetylene torch, will result in the breaking of the tensionmember at the fusible links, and release the latch-hook. In fact, almost any attempt to open the door by force, or otherwise than by the normal operation, of the combination lock, will result in the breaking or disconnection of the tension-member and thus cause the operation of the auxiliary lock, thereby offering an unexpected obstacle to the opening of the door, sufficient in most cases to defeat the attempt.

Now, having described my invention, what I claim and desire to secure by Letters Patent is:

1. The combination with safe and vault locking means including locking-bolts and a main locking mechanism therefor, of an auxiliary lock having a support, a tumblerblock pivoted thereon, a tubular member carried by said support and having a longitudinal slot, an expansive spring in said tubular member, said tumbler block being formed with a portion projecting through said slot and engaged by said spring, said spring tending to move said tumbler-block to active position, and means for holding said tumbler-block in an inactive position, said holding means being releasable by abnormal movement of the main locking means.

2. The combination with safe and vault locking mechanism comprising locking-bolts and main locking means therefor, of an auxiliary lock having a tumbler-block biased to a locking position for preventing movement of the locking-bolts, a latch for holding said tumbler-block at an inactive position, means tending to disengage said latch from the tumbler block, and a tension member for retaining said latch in engagement with the tumblenblock, said tension member being detachably connected with the main locking eans and releasable therefrom by abnormal movement thereof.

3. An auxiliary lock for safe and vault doors, comprising a frame-piece adapted for attachment to the bolt-frame of the door, a tumbler-block pivotedon said frame-piece and movable from an inactive position to a bolt-intercepting position, a spring tending to move the tumbler-block to the lastnamed position, a latch for holding the tumbler-block at an inactive position, a spring tending to move the latch to release the tumblerblock, a tension member connected with said latch and normally holding the same in engaged position, and fusible links forming a part ofsa-id tension member whereby the same will be broken and the tumbler-block released upon exposure'of the parts to abnormal heat.

4. The combination with main locking mechanism for safes and vaults, including a. combination-lock casing, of auxiliary locking means, a member normally holding said auxiliary locking means in an inactive position, and a hooked member in engagement with the combination-lock casing, said holding member being detachably connected with said hooked member so as to be disconnected and freed therefrom by abnormal movement of said casing, a portion of said holding member being formed of materials fusible upon exposure to abnormal heat.

WVALTER E. MURRAY. 

